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    A 3D cardboard cupcake | 
  2010-01-30 | 
   
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  From Margaret: Hi, 
I'm an art student and I'm attempting to build a 3D cupcake out of cardboard. 
I want it to have a circular base of 8.5 inches and sides that are 7'' tall and slope outward so the top of the base is 29'. 
The top with the frosting would be a detachable lid made from a cone with a base circumfrance of 29".
My problem is how to cut the side so they will slope out, I'm pretty sure there needs to be a curve, however I don't how to calculate the degree of it. 
Ideally I want the sides to be a single piece of cardboard. 
I also don't know how to calculate the arc needed to make a cone who's circular base's circumfrence is 29''.  
Thanks, 
Margaret Answered by Stephen La Rocque. | 
   
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